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Polarization Modeling and Predictions for DKIST Part 2: Application of the Berreman Calculus to Spectral Polarization Fringes of Beamsplitters and Crystal Retarders
David M. Harrington, Frans Snik, Christoph U. Keller +2
We outline polarization fringe predictions derived from a new application of the Berreman calculus for the Daniel K. Inouye Solar Telescope (DKIST) retarder optics. The DKIST retar…
Combining angular differential imaging and accurate polarimetry with SPHERE/IRDIS to characterize young giant exoplanets
Rob G. van Holstein, Frans Snik, Julien H. Girard +11
Young giant exoplanets emit infrared radiation that can be linearly polarized up to several percent. This linear polarization can trace: 1) the presence of atmospheric cloud and ha…
Patterned liquid-crystal optics for broadband coronagraphy and wavefront sensing
David S. Doelman, Frans Snik, Nathaniel Z. Warriner +1
The direct-write technology for liquid-crystal patterns allows for manufacturing of extreme geometric phase patterned coronagraphs that are inherently broadband, e.g. the vector Ap…
On-sky performance analysis of the vector Apodizing Phase Plate coronagraph on MagAO/Clio2
Gilles P. P. L. Otten, Frans Snik, Matthew A. Kenworthy +9
We report on the performance of a vector apodizing phase plate coronagraph that operates over a wavelength range of m and is installed in MagAO/Clio2 at the 6.5 m Magellan C…
Circular spectropolarimetric sensing of chiral photosystems in decaying leaves
C. H. Lucas Patty, Luuk J. J. Visser, Freek Ariese +5
Circular polarization spectroscopy has proven to be an indispensable tool in photosynthesis research and (bio)-molecular research in general. Oxygenic photosystems typically displa…